TAXONOMIC CLASS

Fine-loamy, mixed, superactive, thermic Ultic Haploxeralfs

TYPICAL PEDON

Most likely horizonation by proportional odds logistic regression. (NASIS pedons)

Oi–0 to 0.5 inches, (0 to 1 cm); leaves, needles, duff

Range in soil texture for the A horizon (NASIS pedons)

A–0.5 to 2 inches, (1 to 5 cm); reddish brown (5YR 5/4) gravelly loam, reddish brown (5YR 4/3) moist; 17 percent clay; moderate fine subangular blocky parting to moderate fine granular structure; hard, friable, nonsticky, slightly plastic; common very fine roots; many very fine irregular pores; 20 percent subangular metavolcanic gravel; moderately acid, pH 6.1 by Hellige-Truog; abrupt wavy boundary. (1 to 3 inches, (3 to 8 cm) thick)

BAt–2 to 6 inches, (5 to 15 cm); reddish brown (5YR 5/4) gravelly loam, reddish brown (5YR 4/3) moist; 17 percent clay; moderate medium subangular blocky structure; hard, friable, nonsticky, slightly plastic; few fine roots and common very fine roots; common very fine tubular pores; 20 percent discontinuous faint clay films on faces of peds; 25 percent subangular metavolcanic gravel; slightly acid, pH 6.2 by Hellige-Truog; clear smooth boundary. (3 to 7 inches, (8 to 18 cm) thick)

Range in soil texture for the Bt1 horizon (NASIS pedons)

Bt1–6 to 12 inches, (15 to 30 cm); yellowish red (5YR 5/6) loam, dark reddish brown (5YR 3/4) moist; 20 percent clay; moderate medium subangular blocky structure; hard, friable, nonsticky, slightly plastic; common fine roots and few medium and coarse roots; common very fine tubular pores; 30 percent discontinuous distinct clay films on faces of peds and on surfaces along pores; 10 percent subangular metavolcanic gravel; slightly acid, pH 6.2 by Hellige-Truog; clear wavy boundary. (5 to 11 inches, (13 to 28 cm) thick)

Range in soil texture for the Bt2 horizon (NASIS pedons)

Bt2–12 to 23 inches, (30 to 58 cm); yellowish red (5YR 5/6) gravelly loam, yellowish red (5YR 4/6) moist; 24 percent clay; moderate fine subangular blocky structure; hard, friable, slightly sticky, moderately plastic; few fine, medium and coarse roots; many very fine tubular pores; 30 percent discontinuous distinct clay films on faces of peds and on surfaces along pores; 5 percent subangular metavolcanic cobbles, and 20 percent subangular metavolcanic gravel; slightly acid, pH 6.3 by Hellige-Truog; gradual wavy boundary. (3 to 11 inches, (8 to 28 cm) thick)

Range in soil texture for the Bt3 horizon (NASIS pedons)

Bt3–23 to 31 inches, (58 to 79 cm); yellowish red (5YR 5/6) gravelly silt loam, yellowish red (5YR 4/6) moist; 22 percent clay; moderate fine subangular blocky structure; hard, firm, slightly sticky, moderately plastic; common fine roots and few medium and coarse roots; common very fine tubular pores; 30 percent discontinuous distinct clay films on faces of peds and on surfaces along pores; 20 percent subangular metavolcanic gravel; slightly acid, pH 6.2 by Hellige-Truog; abrupt wavy boundary. (5 to 8 inches, (13 to 20 cm) thick)

Crt–31 to 42 inches, (79 to 107 cm); weathered moderately cemented greenschist; few fine roots; 60 percent continuous prominent clay films on rock fragments; abrupt wavy boundary. (5 to 11 inches, (13 to 28) thick)

DISTRIBUTION AND EXTENT

Extent of the Loafercreek soil series (SSURGO)

Butte County, California and occurs in (M261Fb) Lower Foothills Metamorphic Belt subsection of the (M261F) Sierra Nevada Foothills section. MLRA 18 - Sierra Nevada Foothills. The soils are moderately extensive.

TYPE LOCATION

Butte County, California; about 4.5 miles northeast of Wyandotte, California, approximately 2450 feet south and 1400 feet east of the northwest corner of Section 8, Township 19 N., Range 5 E., 39 degrees, 31 minutes, 08.28 seconds North latitude and 121 degrees, 26 minutes, 28.49 seconds West longitude: NAD83-U.S.G.S. Quad: Oroville Dam, California.

RANGE IN CHARACTERISTICS

Range in horizon thickness (NASIS pedons)

Laboratory characterization data (KSSL)

Depth to paralithic bedrock is 20 to 40 inches, (51 to 102 cm). The mean annual soil temperature is 59 to 65 degrees F, (15 to 18 degrees C). The soil moisture control section is dry in all parts from about June 1 to October 15 (about 150 days). The particle-size control section averages 24 to 33 percent clay and 5 to 33 percent rock fragments, mostly gravel. Mineralogy is mixed. Rock fragments on the surface range from 0 to 25 percent gravel, 0 to 10 percent cobbles and 0 to 10 percent stones. Surface and subsoil horizons have 40 to 50 percent silt.

Soil color range (NASIS pedons)

The A horizon dry color is 7.5YR 4/6, 5/4, 5/6, 5YR 4/4, 4/6 or 5/4. Moist color is 7.5YR 3/4, 4/4, 5YR 3/4 or 4/3. Texture is loam, gravelly loam, with high silt content, or silt loam. Clay content ranges from 14 to 22 percent. Rock fragments range from 3 to 20 percent gravel. Base saturation by sum of cations ranges from 60 to 70 percent. Organic matter ranges from 5 to 10 percent. Reaction ranges from strongly acid to neutral.

The BAt horizon dry color is 7.5YR 4/6, 5/6, 5YR 4/6, 5/4, 5/6 or 5/8. Moist color is 7.5YR 3/4, 4/4, 5YR 4/3, 4/4, 4/6 or 2.5YR 4/4. Texture is loam, gravelly loam, with high silt content, or silt loam. Clay content ranges from 15 to 24 percent. Rock fragments range from 3 to 30 percent gravel and 0 to 5 percent cobbles. Base saturation by sum of cations ranges from 65 to 73 percent. Organic matter ranges from 1 to 4 percent. Reaction ranges from strongly acid to neutral.

Soil color signature (NASIS pedons)

The upper Bt horizon dry color is 7.5YR 5/6, 5YR 4/6, 5/6 or 2.5YR 4/6. Moist color is 5YR 3/4, 4/4, 4/6 or 2.5YR 3/6. Texture is loam, gravelly loam, clay loam or gravelly clay loam, with high silt content. Clay content ranges from 18 to 30 percent. Rock fragments range from 5 to 25 percent gravel and 0 to 5 percent cobbles. Base saturation by sum of cations ranges from 65 to 73 percent. Organic matter ranges from 0.5 to 2.0 percent. Reaction ranges from moderately acid to neutral.

Coarse fragment summary (NASIS pedons)

The lower Bt horizon dry color is 7.5YR 4/6, 5/6, 5YR 4/6 or 5/6. Moist color is 7.5YR 4/4, 4/6, 5YR 4/3, 4/4, 4/6, 2.5YR 3/6 or 4/6. Texture is loam, gravelly loam, clay loam or gravelly clay loam. Clay content ranges from 18 to 30 percent. Rock fragments range from 5 to 30 percent gravel and 0 to 10 percent cobbles. Base saturation by sum of cations ranges from 74 to 85 percent. Organic matter ranges from 0.5 to 1.5 percent. Reaction ranges from moderately acid to neutral.

genhz	gravel	channers	cobbles	flagstones	stones	boulders	fine earth
A	6	0	0	0	0	0	94
Bt1	9	0	1	0	0	0	90
Bt2	12	0	3	0	0	0	84
Bt3	10	0	2	0	0	0	88
Cr	0	0	0	0	0	0	100
R	0	0	0	0	0	0	100

COMPETING SERIES

These are the Bearwallow, Churn, Mounthope, Sommeyflat and Wisheylu series. Bearwallow soils do not have high silt content. Churn soils have a hue of 10YR. Mounthope soils are deep. Sommeyflat soils are very deep. Wisheylu soils have hues of 2.5YR and 7.5YR.

GEOGRAPHIC SETTING

Hillslope position proportions (SSURGO)

Geomorphic component proportions (SSURGO)

Loafercreek soils are on ridge tops and side slopes on metamorphic Sierra Nevada foothills. Slopes range from 1 to 90 percent. These soils formed in colluvium and residuum weathered from metavolcanic rocks, mainly greenschist. Elevation is 200 to 1600 feet, (61 to 488 m). Mean annual precipitation is 28 to 40 inches, (711 to 1016 mm). The mean annual temperature is 57 to 63 degrees F, (14 to 17 degrees C). Frost free season is 230 to 260 days.

(NASIS pedons)

	Concave	Convex	Linear
Concave	0.00	0.02	0.02
Convex	0.02	0.16	0.07
Linear	0.05	0.16	0.50

GEOGRAPHICALLY ASSOCIATED SOILS

Co-occurence with components that exist in the same map units as Loafercreek (SSURGO)

These are the competing Exchequer and Sobrante soils and the Argonaut and Whiterock soils. Argonaut soils have argillic horizons and Whiterock soils lack reddish colors in hues of 7.5YR and 5YR.

Taxonomic breakdown of components that exist in the same map units as Loafercreek (SSURGO)

DRAINAGE AND PERMEABILITY

Well drained; high runoff; moderate to moderately rapid saturated hydraulic conductivity in the A and BAt horizons and moderate to moderately slow in the Bt horizon.

(NASIS pedons)

Very poorly drained	Poorly drained	Somewhat poorly drained	Moderately well drained	Well drained	Somewhat excessively drained	Excessively drained	No.Data	N.pedons
0.00	0.00	0.00	0.05	0.87	0.00	0.00	0.08	62

USE AND VEGETATION

This soil is used for livestock grazing, home site development, wildlife habitat, watershed and recreation. Vegetation is blue oak, scattered foothill pine, interior live oak, toyon, whiteleaf manzanita, buckbrush, Pacific poison oak, annual grasses and forbs.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE

Davis, California

SERIES ESTABLISHED

Butte County, California 2005. Source of name is from Loafer Creek on the Oroville Dam Quadrangle.

REMARKS

These soils were previously mapped as Aiken clay loam (Ac) in the Soil Survey of Oroville Area, California 1926.

DIAGNOSTIC FEATURES

(NASIS pedons)

kind	N	top	bottom	thick
argillic horizon	59	3-9-25	48-65-93	34-53-84
cambic horizon	6	2-3-8	17-22-48	14-15-45
lithic contact	19	57-85-110	200-200-203	108-120-144
mollic epipedon	1	0-0-0	26-26-26	26-26-26
ochric epipedon	59	0-0-1	3-8-20	3-8-20
paralithic contact	54	49-66-94	60-89-200	7-17-140

MORPHOLOGIC DOCUMENTATION

musym	pedon_id	taxonname	taxon_kind	pedon_type	depth	depth.class	part_size_class	tax_subgroup	missing.genhz
6145	10CKS001	Loafercreek	series	correlates to named soil	54	mod.deep	fine-loamy	ultic haploxeralfs	some
7085	09BAH008	Loafercreek	series	correlates to named soil	68	mod.deep	fine-loamy	ultic haploxeralfs	some
7085	09CKS010	Loafercreek	series	correlates to named soil	66	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	10BJM021	Loafercreek	series	correlates to named soil	60	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	10BJM055	Loafercreek	series	correlates to named soil	54	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	10BJM059	Loafercreek	series	correlates to named soil	76	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	10BJM060	Loafercreek	series	correlates to named soil	71	mod.deep	fine-loamy	ultic haploxeralfs	some
7085	10BJM061	Loafercreek	series	correlates to named soil	56	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	10MJE011	Loafercreek	series	correlates to named soil	60	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	10MJE045N	Loafercreek	series	within range of map unit	82	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	10MJE079N	Loafercreek	series	correlates to named soil	89	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	11CKS028	Loafercreek	series	correlates to named soil	72	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	11DEB019	loafercreek	series	within range of map unit	68	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	11DEB052	Loafercreek	series	undefined observation	80	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	11DEB087	Loafercreek	series	within range of map unit	57	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	11MJE001N	Loafercreek	series	correlates to named soil	90	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	11PDM001	Loafercreek	series	correlates to named soil	64	mod.deep	fine-loamy	ultic haploxeralfs	none
7085	2013CA6303041	Loafercreek	taxadjunct	taxadjunct to the series	60	mod.deep	fine-loamy	mollic haploxeralfs	none
7086	07SKC003	LOAFERCREEK	series	correlates to named soil	64	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	08AMS011	Loafercreek	series	correlates to named soil	55	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	09CKS001	Loafercreek	series	TUD pedon	97	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	09CKS006	Loafercreek		correlates to named soil	58	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	09CKS036	Loafercreek	series	correlates to named soil	65	mod.deep	fine-loamy	ultic haploxeralfs	some
7086	10CKS007	Loafercreek	series	correlates to named soil	75	mod.deep	fine-loamy	ultic haploxeralfs	some
7086	10CKS009	Loafercreek	series	correlates to named soil	76	mod.deep	fine-loamy	ultic haploxeralfs	some
7086	10CKS011	Loafercreek	series	correlates to named soil	72	mod.deep	fine-loamy	ultic haploxeralfs	some
7086	10MJE016	Loafercreek	series	correlates to named soil	80	mod.deep	fine-loamy	ultic haploxeralfs	some
7086	10MJE019N	Loafercreek	series	correlates to named soil	63	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	10MJE020	Loafercreek	taxadjunct	undefined observation	54	mod.deep	fine-loamy	typic haploxerepts	none
7086	10MJE038N	Loafercreek	series	correlates to named soil	50	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	11KWJ023	Loafercreek	series	correlates to named soil	54	mod.deep	fine-loamy	ultic haploxeralfs	some
7086	11KWJ026	loafercreek	series	correlates to named soil	89	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	11MJE021N	Loafercreek		correlates to named soil	73	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	11MJE022N	Loafercreek	series	correlates to named soil	52	mod.deep	fine-loamy	ultic haploxeralfs	some
7086	11MJE023N	Loafercreek	series	undefined observation	67	mod.deep	fine-loamy	ultic argixerolls	some
7086	2012CA6302046	LOAFERCREEK	series	correlates to named soil	60	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	2013CA6302026	Loafercreek	series		59	mod.deep	fine-loamy	ultic haploxeralfs	none
7086	JAD 357 67-5-21X	Loafercreek			56	mod.deep			some
7086	S09CA009002	Loafercreek		taxadjunct to the series	97	mod.deep	fine-loamy	ultic haploxeralfs	all
7087	10BJM012	Loafercreek cool	series	correlates to named soil	70	mod.deep	fine-loamy	ultic haploxeralfs	some
7087	10CKS030	Loafercreek cool	series	correlates to named soil	52	mod.deep	fine-loamy	ultic haploxeralfs	some
7087	10CKS031	Loafercreek cool	series	correlates to named soil	54	mod.deep	fine-loamy	ultic haploxeralfs	some
7087	10MJE001	Loafercreek	series	correlates to named soil	60	mod.deep	fine-loamy	ultic haploxeralfs	some
7087	2012CA6303021	Loafercreek	series	correlates to named soil	62	mod.deep	fine-loamy	ultic haploxeralfs	none
7087	2012CA6303023N	Loafercreek	series	correlates to named soil	73	mod.deep	fine-loamy	ultic haploxeralfs	none
7088	09CKS021	Loafercreek	series	correlates to named soil	57	mod.deep	fine-loamy	ultic haploxeralfs	some
7088	09CKS024	Loafercreek	series	correlates to named soil	93	mod.deep	fine-loamy	ultic haploxeralfs	none
7088	10BJM044	Loafercreek	series	correlates to named soil	40	shallow	fine-loamy	ultic haploxeralfs	none
7088	10CKS015	Loafercreek	series	correlates to named soil	80	mod.deep	fine-loamy	ultic haploxeralfs	some
7088	10CKS032	Loafercreek	series	correlates to named soil	70	mod.deep	fine-loamy	ultic haploxeralfs	some
7088	10MJE005	LOAFERCREEK	series	correlates to named soil	71	mod.deep	fine-loamy	ultic haploxeralfs	none
7088	10MJE025	Loafercreek	series	correlates to named soil	56	mod.deep	fine-loamy	ultic haploxeralfs	none
7088	11KWJ005	Loafercreek	series	correlates to named soil	45	shallow	fine-loamy	ultic haploxeralfs	some
7088	11KWJ030	Loafercreek	series	correlates to named soil	52	mod.deep	fine-loamy	ultic haploxeralfs	none
7088	2012CA6302033	LOAFERCREEK	series	correlates to named soil	75	mod.deep	fine-loamy	ultic haploxeralfs	none
7205	S2007CA109005	LOAFERCREEK	series	TUD pedon	99	mod.deep	fine-loamy	ultic haploxeralfs	all
7211	10BJM051	Loafercreek	series	correlates to named soil	60	mod.deep	fine-loamy	ultic haploxeralfs	none
8034	2012CA6303002	Loafercreek	taxadjunct	taxadjunct to the series	48	shallow	fine-loamy	mollic haploxeralfs	all
NOSYM	300J	LOAFERCREEK	series	representative pedon for component	74	mod.deep	fine-loamy	ultic haploxeralfs	all
NOSYM	716Q	LOAFERCREEK	series	OSD pedon	79	mod.deep	fine-loamy	ultic haploxeralfs	all
NOSYM	S2000CA007009	LOAFERCREEK	series	representative pedon for component	74	mod.deep	fine-loamy	typic haploxeralfs	all
NOSYM	S2000CA007012	Loafercreek	series	OSD pedon	79	mod.deep	fine-loamy	ultic haploxeralfs	all

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